Xerox DocuColor 7000 EN - Manual (Page 182)

DocuColor 8000/7000 Operator Manual 6-28
6. Maintenance
Banding samples
The following examples of the test print show banding in the color
bar of the corotron that needs to be replaced and in the 3-color
bar. The 3-color bar (CMY) is there to help you identify which color
is showing banding.
Black Banding Cyan Banding
Magenta Banding Yellow Banding